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Finding the Fourth Proportional to 18,499.64, 27,749.60 and 7,407.28

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Solution

The fourth proportional to 18,499.64, 27,749.60 and 7,407.28 is: 11,110.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,499.64 : 27,749.60 = 7,407.28 : x
  2. Step 2: Convert to fraction form
    18,499.64/27,749.60 = 7,407.28/x
  3. Step 3: Cross multiply
    18,499.64x = 27,749.60 × 7,407.28
  4. Step 4: Simplify right side
    18,499.64x = 205,549,057.09
  5. Step 5: Solve for x
    x = 205,549,057.09/18,499.64
  6. Step 6: Final answer
    x = 11,110.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.